I have noticed over the last few months that there were sourceforge projects I showed an interest in that were binary only. For a time I tried to convince myself the project maintainers were just too busy and they were behind posting the sources. Now I see that we could rename the site, Binary-Forge.
I remember clearly that for a long time, SF was the premier site for hosting open source development. I myself developed an open source XML project on SF (xmltools).
There is a big difference though between hosting adware, and malware. Personally I had more respect for the mode of operation where the sources were posted, with the appropriate cryptographic hashes, and a polite warning that prepared binaries were included as a courtesy, but the build-it-yourself from sources technique was safer, primarily because you could review every line of the code if desired.
Just what made SF the premiere site were the obvious superior features, but topping it off of course was the reputation they earned in the early days. Should someone with the time and resources wish to compete with them now, the hosting meme is very well defined and with SF reputation currently encumbered as it is, they could easily be replaced in the wink of an eye.
It makes me sad to see SF come to this, and I can only assume it has happened because the people who had the image in mind of a trustworthy hosting site are now gone, and bean-counters have taken over. It's too bad that short-sightedness makes aberrant practices seem more profitable than retaining the trust and love of the developer community.